OEC

OEC may refer to:

Finance

• The Observatory of Economic Complexity, a data visualization site
• Ordre des Experts-Comptables, French association of chartered accountants

Transportation

• Orion Expedition Cruises, Australian based luxury expedition cruise line
• Otis Elevator Company, an American company that manufactures vertical transportation systems
• Osborn Engineering Company, known as OEC, an historic British former manufacturer of motorcycles

Other

• Odd Eye Circle, a South Korean girl group
• Offshore Energy Center, sponsor of the Ocean Star Offshore Drilling Rig & Museum in Galveston, Texas, United States
• Old Earth creationism, a term for several types of creationism
• Olfactory ensheathing cells, a type of glial cell found in the nervous system
• Oregon Environmental Council, an American environmental organization
• Orissa Engineering College, a technical institution in Bhubaneswar, Orissa, India
• Outdoor Emergency Care, a course for certification of first aid in non-urban situations
• Overseas Employment Certificate, an identity document in the Philippines
• Oxford English Corpus, an English text corpus
• Oxygen evolving complex, a water oxidizing enzyme
• .OEC, the file format for OE-Cake!, a fluid physics software application